random double generator between interval

double randomDouble2( double low_bound, double high_bound )
{
    static bool didSeeding = false;

    if (low_bound > high_bound){
        std::swap(low_bound, high_bound);
    }

    if (!didSeeding) {
        std::mt19937 engine;
        didSeeding = true;
    }

    return std::uniform_real_distribution<>( low_bound, high_bound )( engine );

}